ZHCSAA4B September 2012 – September 2015 TPA3110D2-Q1
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 TPA3110D2-Q1 Modulation Scheme
- 8.2.2.2 Ferrite Bead Filter Considerations
- 8.2.2.3 Efficiency: LC Filter Required With the Traditional Class-D Modulation Scheme
- 8.2.2.4 When to Use an Output Filter for EMI Suppression
- 8.2.2.5 Input Resistance
- 8.2.2.6 Input Capacitor, CI
- 8.2.2.7 BSN and BSP Capacitors
- 8.2.2.8 Differential Inputs
- 8.2.2.9 Using Low-ESR Capacitors
- 8.2.3 Application Curve
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
8.2.2.5 Input Resistance
Changing the gain setting can vary the input resistance of the amplifier from its smallest value, 9 kΩ ±20%, to the largest value, 60 kΩ ±20%. As a result, if a single capacitor is used in the input high-pass filter, the –3 dB or cutoff frequency may change when changing gain steps.
The –3-dB frequency can be calculated using Equation 2. Use the ZI values given in Table 2.
Equation 2. 